Rosemount 499AOZ Amperometric Ozone Sensor


The 499AOZ sensor is a membrane-covered amperometric sensor for the uninterrupted determination of dissolved ozone in water. The main applications include ozone measurement in, bottled water, municipal drinking water and soft drinks. Other applications comprise pharmaceutical manufacturing, semiconductor, and food processing.

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Accuracy depends on the accuracy of the chemical test used to calibrate the sensor. 

Ambient Temperature
32 to 122 °F (0 to 50 °C)

Automatic compensation for changes in membrane permeability
Easily replaceable membrane, no special tools required

Measurement Range
0 to 3 ppm (mg/L) as O3.

1 lb/3 lb (0.5 kg/1.5 kg) Weight and shipping weight are rounded up to the nearest whole pound or 0.5kg.


  • Molded from ozone-resistant polysulfone
  • Pressure Equalization preserves correct membrane tension in pressurized samples
  • Variopol connector option permits the sensor to be swapped out without running new cable